Door lock closure and assembly



June 24, 1958 P. FRIEDMAN ErAL 2,339,913

DOQR LOCK CLOSURE AND ASSEMBLY Fuga Nov. s, 195e FIG.|. #la

INVENTORS PH|L|P FRIEDMAN BY GEORGE J. FFUEDMAN wml Hwa ATTORNEY United States Patent O DOOR LOCK CLOSURE AND ASSEMBLY Philip Friedman and George J. Friedman, New York, N. Y.

Application November 5, 1956, Serial No. 620,363

1 Claim. (Cl. 70-146) Our invention relates to a new type of closure and lock designed for use on a door.

One of the objects of our invention is to provide a door lock which is contained entirely within the door knob and is operated by a removable key, the installation of which will necessitate only the drilling of one hole through the door frame.

It is a further object of our invention to provide such a door lock which is fool-proof, easy to install and simple to operate.

A further object of our invention is to provide such a lock and closure especially suited to be adapted for use on outside screen doors and storm doors which are in common use today. Our invention eliminates many of the necessary parts of a tumbler-type lock which is ordinarily used on such doors and is easier to install than the tumbler-type locks currently in use. Further objects and advantages of our invention will appear in the drawings and specifications herein. Similar numerals throughout the several views of the drawings refer to similar parts of our invention. We attain the objects and advantages of our invention by the device illustratedV in the accompanying drawings. Y

Figure 1 is a top plan view of our device installed on a door with the top portion of the door cut away and a central portion of the device cut away to show the interior mechanism;

Figure 2 is a cross-section along the lines 2 2 in Figure 1;

Figure 3 is a cross-section of the device along the lines 3 3 in Figure 2;

Figure 4 is a cross-section along the lines 4 4 in Figure 3; and

Figure 5 is a cross-section along the lines 5 5 in Figure 3.

Our device is used with a door 11 contained within a door frame 12. The main portions of our device, as shown in Figure 1, consist of an outer door handle support assembly 13 and an inner door handle support assembly 14. The outer door handle assembly 13 comprises a door knob 15 including a door knob shaft 16, a frame 17, a shaft 18, a frame plate 19, and an inner shaft 20. The outer door knob assembly 13 also has a swivel-type tumbler lock assembly 21 with a key 22 contained in a hollow end of the outer door knob shaft 16. The shaft 18 is hollow and has a wider portion 23 and a stop 24. There is also a stop pin 25 which is inserted in the widened hollow portion of the shaft 18. The inner shaft 20 is then inserted. The inner shaft 20 keeps the stop pin in place.

There is a stop pin spring 26 which rests on a rim of the stop pin 25 and also on the inner side of the shaft 18. The stop pin 25 ts through an opening 27 of the shaft 18 and is adapted to move in and out of the opening 27 by means of rotation of the inner shaft 20 in the following manner: The inner shaft 20 `has a seat 28. When this seat faces the rim of the stop pin 25, the stop pin spring ICC 26 forces thevstop pin 25 to the center hollow portion of the shaft 18 so that it does not protrude.

' When the inner shaft 20 is rotated approximately 90 degrees, the bottom rim of the stop pin 25 is displaced outwards and against the action of the stop pin spring 26 so that the stop pin 25 will protrude from the shaft 18 and titk through an opening 28a in the frame 17. This acts as a positive lock and prevents the louter shaft 18 from rotating. The inner shaft 20 is rotated by means iof a swivel-type tumbler lock 21 and key 22. The end 29 of the inner shaft 20 ts into a recess portionin the corresponding end of swivel-type tumbler lock 21. A spring 30 is also apart of the outer door knob assembly 14. One end of the spring 30 tits through a hole 31 in the stop 24 and the other end of the spring tits around a shoulder 32 in the frame 17. The action of the spring forces the stop 24 against the shoulder 33 in the frame 17. The importance of this feature will be shown hereinbelow in the description of how the lock works as a door closure.

The entire outer door knob assembly is inserted through an opening of the proper size in the door 11 and the inner door handle assembly 14 is then inserted over the shaft 18 and fastened to the outer door knob assembly 13 by means of screws 34. The inner door handle assembly 14 comprises a hollow door handle and shaft 35, an inner latch shaft 36, and an inner plate 37. The Ydoor handle and shaft 35 is cast of one piece and is inserted in an opening in the center of the inner plate 37 and permanently xed therein by means of pressure to spread the circumference of the inner end of the handle and shaft 35 so that it may not be removed from the central opening in the plate 37. The spreading is done in such a manner that the handle may rotate freely in the opening in the plate. The inner latch shaft 36 lits within an end of the inner shaft 20 and is adapted to rotate the inner shaft 20. Thus, the stop pin 25 may be placed in locked and nnlocked position by the action of either the swivel tumbler lock 21 and key 22 or by the inner latch shaft 36. Thus, the door may be locked or unlocked from either the outside or the inside.

We have also provided a strike plate mounted on the door frame 12 having a strike bar 38. When the door is closed the latch portion 39 of the inner door handle and shaft 35 engages the strike bar 38. This keeps the door securely closed. Approximately a quarter turn of the entire lock assembly will remove the latch portion 39 from the strike bar 38 and permit the door to be opened. When the door is closed, the latch har 39 Will again engage the strike bar 38 and keep it securely closed. Thus, it will be seen that any device which prevents the lock assembly from rotating when the door is closed will act as a positive lock because the door can be opened only when the latch portion 39 is rotated. Thus, the action of the stop pin 25 in preventing the rotation of the shaft 18 locks the door. The stop 24 is designed to travel between the shoulders 32 and 33 of the frame 17. It will be noted that this limits the action of rotation of the shaft 18 to approximately 90 degrees and is adapted to keep the inner door handleA 35 normally on a horizontal plane so that the latch portion 39 may engage the strike bar 38. When either the handle 35 or the door knob 15 is turned, the handle is moved from its normally horizontal position to a vertical position so that the latch portion 391may disengage the strike bar 38.

While we have described the preferred form of our invention, there may be other forms in which our invention may be embodied without leaving the scope of the invention and we do not want to be limited to the exact details as set forth herein but wish to be protected for all constructions within the limitations of the claim following.

Wherefore, we claim: Y The combination ofa door having front and rear surfaces lying in substantially parallel planes and containing a bore substantially perpendicular to saidV planes, and aV latch mechanism including an outer door handleassembly and an inner door handle assembly; said outerdoor handle assembly comprising a frame tted into the said bore; laldoor knob attached to ahollow shaft, said hollow-shaft having a stop `and rotatably extending through the frametand the bore and being secured against rotation bywthe said stop, ashoulder on the said frame, and a springdisposed between thev stop and the shoulder; a tumbler lock within the said door knob engaging a second shaft` within the first said hollow shaft and havinga hollow portion at its end near the inner door handle assembly and a seat on a portion thereof; an opening in the frame corresponding to an opening in the rst said 4 hollow shaft; a stop pin circled by a helical spring adapted to rest on the said seat and to move through the said openings when the second said shaft is rotated to move References Cited in the tile of this patent UNITED STATES PATENTS Douglas May 8,*1928 Grevengoed Jan. 3l, 1956 

